That was going to be my suggestion, check your wires...I had a similiar issue this weekend. One of my wires just got old and corroded and broke away from its connection. Trace them from the pump back to the battery. If you can....you can also simply run a line from your battery to the pump connector (the red side) and see if it kicks the pump on, then you know the pump is good and its just a wire issue or a possible blown fuse. If you have an inline fuse on the wire, check that, they burn out and you just need to replace it.

Good luck!

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